250 sq ft room
The ENERGY STAR chart puts a 250 sq ft room at 6,000 BTU/hr.
| Situation | BTU/hr |
|---|---|
| Normal | 6,000 |
| Heavily shaded (−10%) | 5,400 |
| Very sunny (+10%) | 6,600 |
| 4 regular occupants (+1,200) | 7,200 |
| Kitchen (+4,000) | 10,000 |
Worked example
A sunny 250 sq ft living room used by 3 people: 6,000 × 1.1 = 6,600, plus 600 for the third person = 7,200 BTU/hr. Round up to the nearest unit size sold.
Frequently asked questions
How many BTU for 250 sq ft?
6,000 BTU/hr (ENERGY STAR chart), adjusted for sun and occupancy.